SOLUTION: Which term of the arithmetic sequence is -18 , given a1=7 and a2=2?
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Question 1039880: Which term of the arithmetic sequence is -18 , given a1=7 and a2=2?
Found 2 solutions by Aldorozos, ikleyn:
Answer by Aldorozos(172) (Show Source): You can put this solution on YOUR website!
Read here
http://www.regentsprep.org/regents/math/algtrig/atp2/arithseq.htm
Your first term is 7
The second term is
2=7+(2-1)r
r=-5
-18= 7+ (n-1)(-5)
N=6
Answer by ikleyn(52788) (Show Source): You can put this solution on YOUR website!
.
Or read here
- Arithmetic progressions
- The proofs of the formulas for arithmetic progressions
- Problems on arithmetic progressions
- Word problems on arithmetic progressions
- Chocolate bars and arithmetic progressions
- Free fall and arithmetic progressions
- Uniformly accelerated motions and arithmetic progressions
- Increments of a quadratic function form an arithmetic progression
- Mathematical induction and arithmetic progressions
- One characteristic property of arithmetic progressions
- Mathematical induction for sequences other than arithmetic or geometric
- Proving inequalities by the method of Mathematical Induction
- Solved problems on arithmetic progressions
OVERVIEW of my lessons on arithmetic progressions with short annotations is in the lesson OVERVIEW of lessons on arithmetic progressions.
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